Installation Manual

1 Installation
The Radio Frequency HUB Module (RFHM) is an integrated receiver (Base Station), usually mounted on
the rear shelf of the vehicle.
RF Hub Installation Manual
• RF Hub is mounted on cab back wall with two push pins
• Installation includes the following steps: o Connect two
vehicle side harnesses to RF Hub module o Install RF Hub
module to the cab back wall with two push pins
2 General Description
The RFHM interfaces with the Remote Keyless Entry (RKE) and FOBIK via both RF and LF and the
Immobilizer Transponder key via LF. The Radio Frequency HUB Module (RFHM) communicates with the
TPM Sensors via RF.
The Radio Frequency HUB Module (RFHM) contains the controlling logic for the Passive Entry Keyless Go
(PEKG) feature, Remote Keyless Entry (RKE) feature, and the Keyless Ignition Node (KIN) lighting where
applicable.
The Radio Frequency HUB Module (RFHM) communicates on CAN C to the rest of the vehicle modules.
The RFHM communicates to Keyless Ignition Node (KIN) via a dedicated KIN-Line.
The RFHM receives ignition states, OFF/LOCK (KEY-OUT), OFF (KEY-IN), ACC, RUN & START from the
Ignition Node Module (IGNM) and then uses that information to determine actual ignition position and
communicate that information over the CAN vehicle communication bus.
The Radio Frequency HUB Module (RFHM) also interfaces with the vehicle’s door handles, trunk/lift-gate
and multiple LF antennas for purposes of providing PEKG system functionality.
3 Technical and Functional Description
This is an RF Hub module (RFHM) with Keyless Go and optional Passive Entry functionality. It has an LF
driver for communication with a Fob for the PEKG function and an RF receiver for TPM, RKE and PEKG